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NOAO Newsletter - KPNO Operations - September 2000 - Number 63


Phoenix Continues at Kitt Peak

Ken Hinkle

Phoenix, which is to be offered as a first-light instrument at Gemini South, will be available on the KPNO 2.1-m and Mayall 4-m telescopes in February and March 2001 before shipment to Chile. By January, Phoenix will be fitted with a new InSb array, which will improve the instrument's sensitivity. Observers are encouraged to apply for KPNO time with Phoenix for projects that can be completed within this time frame or for observations that will enhance the use of Phoenix at Gemini South.

Use of Phoenix on Gemini South is expected to begin in June 2001, with Phoenix to be delivered to Gemini South in May 2001. As previously announced, work on Phoenix to prepare it for Gemini South will be completed by January 2001. As a result, we are pleased to be able to offer Phoenix on the Kitt Peak 2.1-m and 4-m telescopes in February and March 2001. It may also be possible to schedule Phoenix into the April bright period, April 1-15, if permitted by the shipping deadline.

As part of the loan arrangement to Gemini South, Gemini will loan NOAO an InSb array. We anticipate installing this new detector in the 2000B semester. The array will be in the instrument in the 2001A semester for on-telescope calibration before shipment to Gemini. Obviously, this is a major benefit to Kitt Peak users in the 2001A semester. The sensitivity of Phoenix observations on all but the brightest sources in the 1-3 Ám region was limited by the current detector (see NOAO Newsletter, No. 59 ).

Example spectra from the Phoenix

Caption: Phoenix in long-slit mode is used to map the physical conditions in the shell surrounding o Ceti. A set of 4.6-Ám CO spectra recorded at the positions (top to bottom) marked in arcsec west of the star. The CO emission results from resonant scattering in the circumstellar shell. These spectra, obtained with Phoenix on the KPNO 4-m in October 1998, will appear in "Mira's Wind Explored in Scattering Infrared CO Lines" by N. Ryde, B. Gustafsson, K. Eriksson, and K. H. Hinkle (Ap. J., in press).


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